SONARPY-1257 fix quality flaws (#1365)

Author: maksim-grebeniuk-sonarsource

python-checks/src/main/java/org/sonar/python/checks/AbstractUnreadPrivateMembersCheck.java

@@ -38,19 +38,17 @@ public abstract class AbstractUnreadPrivateMembersCheck extends PythonSubscripti
   @Override
   public void initialize(Context context) {
     String memberPrefix = memberPrefix();
-    context.registerSyntaxNodeConsumer(CLASSDEF, ctx -> {
-      Optional.of(ctx.syntaxNode())
-        .map(ClassDef.class::cast)
-        // avoid checking for classes with decorators since it is impossible to analyze its final behavior
-        .filter(classDef -> classDef.decorators().isEmpty())
-        .map(TreeUtils::getClassSymbolFromDef)
-        .map(ClassSymbol::declaredMembers)
-        .stream()
-        .flatMap(Collection::stream)
-        .filter(s -> s.name().startsWith(memberPrefix) && !s.name().endsWith("__") && equalsToKind(s) && isNeverRead(s))
-        .filter(Predicate.not(this::isException))
-        .forEach(symbol -> reportIssue(ctx, symbol));
-    });
+    context.registerSyntaxNodeConsumer(CLASSDEF, ctx -> Optional.of(ctx.syntaxNode())
+      .map(ClassDef.class::cast)
+      // avoid checking for classes with decorators since it is impossible to analyze its final behavior
+      .filter(classDef -> classDef.decorators().isEmpty())
+      .map(TreeUtils::getClassSymbolFromDef)
+      .map(ClassSymbol::declaredMembers)
+      .stream()
+      .flatMap(Collection::stream)
+      .filter(s -> s.name().startsWith(memberPrefix) && !s.name().endsWith("__") && equalsToKind(s) && isNeverRead(s))
+      .filter(Predicate.not(this::isException))
+      .forEach(symbol -> reportIssue(ctx, symbol)));
   }
 
   protected boolean isException(Symbol symbol) {

python-checks/src/main/java/org/sonar/python/checks/cdk/CdkUtils.java

@@ -290,19 +290,6 @@ public SubscriptionContext ctx() {
     }
   }
 
-  /**
-   * In the case of unpacking expression, we cannot generate flows at the moment.
-   * However, to avoid a wrong interpretation of the unpacked expression in the context of absent arguments,
-   * an alternative dummy must be returned, which should not lead to false positives.
-   * The resolving of such expressions can be improved by <a href="https://sonarsource.atlassian.net/browse/SONARPY-1164">SONARPY-1164</a> if necessary.
-   */
-  static class UnresolvedExpressionFlow extends ExpressionFlow {
-
-    private UnresolvedExpressionFlow(SubscriptionContext ctx) {
-      super(ctx, new LinkedList<>());
-    }
-  }
-
   /**
    * Dataclass to store a resolved KeyValuePair structure
    */

python-frontend/src/main/java/org/sonar/python/semantic/BuiltinSymbols.java

@@ -30,6 +30,10 @@ private BuiltinSymbols() {
     // empty constructor
   }
 
+
+  public static final String CLASS_METHOD_DECORATOR = "classmethod";
+  public static final String STATIC_METHOD_DECORATOR = "staticmethod";
+
   /**
    * See https://docs.python.org/3/library/constants.html#built-in-consts
    */
@@ -70,7 +74,7 @@ private BuiltinSymbols() {
     "enumerate",
     "input",
     "oct",
-    "staticmethod",
+    STATIC_METHOD_DECORATOR,
     "bool",
     "eval",
     "int",
@@ -101,7 +105,7 @@ private BuiltinSymbols() {
     "list",
     "range",
     "vars",
-    "classmethod",
+    CLASS_METHOD_DECORATOR,
     "getattr",
     "locals",
     "repr",
@@ -124,7 +128,7 @@ private BuiltinSymbols() {
     "divmod",
     "input",
     "open",
-    "staticmethod",
+    STATIC_METHOD_DECORATOR,
     "all",
     "enumerate",
     "int",
@@ -165,7 +169,7 @@ private BuiltinSymbols() {
     "long",
     "reload",
     "vars",
-    "classmethod",
+    CLASS_METHOD_DECORATOR,
     "getattr",
     "map",
     "repr",
@@ -339,8 +343,5 @@ public static Set<String> all() {
     return all;
   }
 
-  public static final String CLASS_METHOD_DECORATOR = "classmethod";
-  public static final String STATIC_METHOD_DECORATOR = "staticmethod";
-
   public static final Set<String> STATIC_AND_CLASS_METHOD_DECORATORS = Set.of(CLASS_METHOD_DECORATOR, STATIC_METHOD_DECORATOR);
 }